"Whatever you fancy, all of our Plant Kitchen dishes have been developed with a 'flavour first' mentality at their heart: think vegan bolognese enriched with miso for an intense depth of flavour, or pizza topped with jackfruit for a smokey taste and rich texture."

But dozens have turned to social media to lambaste the chain.

One said: "Places like M&S want to jump on the vegan bandwagon but don't understand that by way of saying it's got milk and eggs present it's not vegan!"

An M&S spokesperson said: "Our Plant Kitchen range is 100 per cent suitable for vegans and we engaged with both the Vegan Society and Allergy UK when developing them.

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"However, vegan products may not be suitable for people with severe allergies because allergens may be present in the environment in which they are made.

"This is clearly flagged on the packaging as a steer to those who need it."

The furore over the M&S range has, however, been overshadowed by another big vegan story this week - the launch of Greggs' meat-free sausage roll. If you missed it, you must have been living under a rock, but you can catch up by watching its launch video below.